History has entered the Warring States Period, and warfare has shifted from the rigid frontal warfare of military vehicle tactics in the early years to a more mobile and flexible combat mode.

Cavalry appeared as an independent branch of the army, and at that time the major powers established cavalry units,

For example, Qin, Zhao and other countries are known as "thousands of cars, ten thousand horses", and the army has gradually changed from infantry and riding to equal emphasis on chariots and horses.

The biggest change was made by Zhao Guo first of all. Located in the north, the Zhao State was adjacent to the Loufu, Linhu, Xiongnu and other ethnic minorities, and suffered greatly from its disturbances, while the traditional chariot infantry of the Zhao State was very disadvantageous when fighting against the flexible and fast Hu cavalry. In order to change this situation and enrich the country and strengthen the army, King Wuling of Zhao carried out the reform of "Hufu cavalry shooting" in the country, and he declared that "Jinwu will be Hufu cavalry and shooting to teach the people" to reduce the chariots in the army and increase the cavalry; It is required to change the traditional Han people's wide-sleeved clothes to Hu-style tight-fitting clothing, which is convenient for riding and shooting.

From here, the status of cavalry in the Central Plains countries gradually improved, and it became a major force in the army.

Because of this powerful cavalry, Zhao became a powerful country that could compete with Qin militarily in the late Warring States period.

Zhao attacked Lin Hu with infantry cavalry, Lou annoyed "a thousand miles", Li Mu used more than 10,000 horsemen with infantry soldiers to break the Huns and annihilate more than 100,000 enemies.

The Zhou people arose to raise horses for the Shang Dynasty, and the Qin people also arose to raise horses for the Zhou people. As early as the Shang Dynasty, the rulers recognized the importance of horses and gave birth to the official horse management system, also known as "horse administration". The word "Ma Zheng" was first seen in the "Book of Rites and Moon Order": Ma Zheng is the politics and religion of raising horses.

The head of the Wu family, Wu Shilu, is in charge of nearly thirty percent of the Qin State's war horse sources, and if the Dragon Slayer King wants to create chaos in the Qin State, he must have contact with the Wu family head. Cavalry is the main combat force that will appear in this era. The Dragon Slayer King is naturally clear, so what kind of strategy will he adopt next? Meng Yi doesn't know, but there is one person who may know: Wu Shilu, the head of the Wu family!

Meng Yi took fifty children of the Meng family to the ranch of Wushilu. The chivalrous girl Dong Rou didn't know where to get the news, so she pulled the girl to smile and ran around to eat and drink. In this regard, Meng Yi was helpless, but fortunately, there would be no danger here.

Wushi County, Beidi County is located between the Guanzhong Plain and the Saibei Grassland, Liupan Mountain (Longshan) happens to be deep in it, known as "the throat of Qinfeng, the important land of Guanlong". Liupan Mountain has always had the reputation of "the mountain is high and Taihua is 3,000 zhang, and the danger is 200 heavy in Qinguan", the elevation of the main peak Migang Mountain is nearly 3000 meters, the east slope of Liupan Mountain is steep, the west slope is gentle, there are small pine forests on the high mountain, and the rest of the part is grassland. The southern section of Longshan was called Longban in ancient times, about 100 kilometers long from north to south, and about 2,000 meters above sea level. The mountain is steep, which is the boundary between the Weihe Plain and the Longzhong Plateau.

Meng Yi and the others walked through the canyon and saw a pasture full of sunshine, a few white clouds floating in the blue sky, the green grass as far as the eye could see, a flock of lambs, eating grass with relish on the grass, the cows walking leisurely, and a few jujube red horses running on the grass, looking like a red glow from a distance. The ranch is located in a natural grassland with beautiful scenery. The sky is like a blue hat in the grassland, and the white clouds are like big white flowers on the blue hat. The grasslands under the sky are like a green ocean, stretching into the distance. Although they are all green, they are deep and light. The forest on the knoll in the distance is verdant. The nearby meadow is full of a variety of wildflowers. On the open grassland, the horses run fast, and the herds of cattle and sheep take a leisurely walk, which can't help but remind people of "the sky is blue, the wilderness is vast, and the wind blows the grass and sees the cattle and sheep low." Verses.

Meng Yi secretly thought in his heart: "After the birth of human civilization, sheep, cows, horses, camels and other animals were domesticated one after another, providing human beings with resources such as meat, milk, and leather, forming the foundation of nomadic society. This is a technical means of using nature that appeared at about the same time as the agricultural civilization, and both are methods of survival that were born according to the natural geographical conditions of the settlement. ”

"It's a paradise." The heroine Dong Rou couldn't help but sigh with emotion.

"Hmph, you'll know it's awesome if you stay for a few days." Meng Yi laughed.

"Why? I think it's pretty good here! The heroine Dong Rou asked inexplicably.

"On the one hand, nomads have no shortage of cattle and sheep, but they are not necessarily willing to eat them every day. Because the bovine and sheep butter is too heavy, it is difficult to digest, and it is easy to cause some obesity diseases. On the other hand, the climate in the north is very cold, and the spring and summer are fine, but once the severe winter and heavy snow occur, it is difficult for not only cattle and sheep to survive, but also herdsmen. Finally, there are many nomadic tribes in the north, attacking and plundering each other, which is more tragic than in the Central Plains. You say, do you still think it's a paradise? Meng Yi patiently explained.

"But this is the county of the Qin State, can't the Qin State restrain these tribes?" The heroine Dong Rou still asked confusedly.

"The Qin state can only effectively manage the farming towns, and as for these tribes that migrate with the water and grass, they can only nominally make them pay tribute. The so-called heaven and earth are big, and the Qin State is helpless! Meng Yi explained with a smile, "Maybe after the Qin State unifies the Six Kingdoms, there will be a chance to completely end this nominal control." ”

In Xianyang, Meng Yi heard that the cattle, sheep and horses of Wushi Lu were measured in the "valley", and when he looked at it on the spot, he found that it was indeed worthy of its reputation.

As far as the eye can see, there are at least ten large fences surrounding a dozen small valleys, leaning on each other.

The sun is shining like gold, the clouds are pure and warm, and the clear river water flows through the meadows full of wildflowers. The towering bunkers stand tall in the air, or groups of three or five, or independent hills, depending on the mountain, it is magnificent.

Wujiabao is located on a cliff face, with only one road and one entrance. The watchtowers are all made of mud and stone, the appearance is beautiful, the wall is solid, and the main building materials are mountain stones, mud, hemp tendons, wood, etc. Hemp tendon is made of red hemp stalk or barley stalk and wheat straw, the hemp stalk is cut into inch segments, and the hemp tendon is formed by hammering the velvet, and in the mud, the viscosity is very strong. The watchtower is sharp and angular, and the surface is smooth and clean, such as a knife and an axe. The shape of the ancient towers is generally a high-shaped square cylinder: there are four corners, five corners to eight corners, and a few up to thirteen angles. The height is generally not less than 10 meters, mostly about 30 meters, and the height can reach 68 meters. The watchtower body is mostly quadrangular, there are also pentagonal, hexagonal, there is a watchtower with thirteen corners in the middle of the county border road township, it is very peculiar.

After all, Meng Yi was a high-ranking official of the Qin State, and it was actually a very easy thing to make an appointment to meet the head of the Wu family, Wu Shilu.

Inside the Wujiabao Hall.

"Master Meng, he is really young and promising, and he became the captain of the Qin State at a young age." The head of the Wu family, Wu Shilu, said in an official tone.

"Patriarch Wu, the Ming people don't say secret words. I'm here to inquire about someone. Meng Yi observed the facial expressions of the head of the Wu family, Wu Shilu, very carefully, hoping to see some clues.

"I don't know who it is, and I need to bother Lord Lieutenant to visit in person?" The head of the Wu family, Wu Shiluo, asked calmly.

"Last month, were there any strangers who came to buy a large number of war horses?" Meng Yi did not directly point out that this was related to the transaction between the leaders of Chang Yu and Rong Di.

"There is such a person, but he only bought a small number of good horses, I don't know what is wrong?" The head of the Wu family, Wu Shilu, unexpectedly admitted the incident and gave some details in detail.

The head of the Wu family, Wu Shilu, further explained, "The Wu tribe has long evolved into a settled family combining animal husbandry and farming, and has also received great assistance from the Qin state to prepare for the establishment of a new county seat. The purchase and sale of cattle, sheep and horses by our Wu family will be recorded for the collection and payment of taxes by the Qin State. ”

At this moment, an urgent report came from outside the hall: the Huns invaded south.

The Xiongnu are one of the nomadic people living in northern China, and have long been active between the Yin Mountains in the south and Lake Baikal in the north, becoming a powerful nomadic people in the north. In the late Warring States period, the Xiongnu had entered a slave society. Slave-owning nobles took advantage of the swift movement of cavalry and often penetrated deep into the Central Plains to harass and plunder the inland tribes, which were mainly agricultural. At that time, Qin, Zhao, and Yan were neighbors with the Xiongnu, and wars often broke out. As the countries were busy with civil wars, they generally took a defensive position against the Xiongnu, building the Great Wall in the north and sending troops to defend it.

Before the founding of the Xiongnu, the steppes of Northeast Asia were divided by many clans and tribes of different sizes. At that time, the situation of tribes and tribal alliances was "sometimes large and sometimes small, and not scattered"; It is "scattered in the valley, since childhood, the army commander, often and more than a hundred people gather, but there is no one".

At that time, it was distributed in the southeast and west of the grassland, the Lamulun River and the Laoha River Basin, which was the Donghu tribal alliance;

Distributed in the west and south of Lake Baikal in the Selenga River basin is the Dinling Tribal Union;

Distributed in the north and south of the Yinshan Mountains, including the so-called "Henan" (Ordos grassland) south of the Hetao, is the Xiongnu tribal alliance.

In addition, there are tribal groups scattered throughout the steppe. The later Xiongnu State was established on the basis of the Xiongnu tribal alliance and conquered the above-mentioned tribal alliances, tribes and some other small countries.

At this time, the Xiongnu had just defeated the powerful northern nomadic tribes such as Linhu, Donghu, and Yueshi, and in addition to suffering a big loss at the hands of Li Mu of Zhao State, they were almost rampant in the north.

Beidi County, which was placed by King Zhaoxiang of Qin in 271 B.C., was one of the 36 counties in the early Qin Dynasty, and governed Yiqu County (in the southwest of Qingyang City, Gansu Province). Beidi County was located on the edge of the rising Xiongnu tribes. Wushi County, on the other hand, was at the northern end of Beidi County and was more vulnerable to harassment by the Xiongnu.

Thousands of Hun cavalry plundered cattle, sheep and horses outside Wujiabao.

"The Huns suddenly went crazy, there is only one possibility. That is, the grassland was hit by a white plague, and heavy snow covered the winter nest. Cattle and sheep could not eat grass, so they could only starve to death. It seems that the Huns put their ideas on the head of our Wujiabao. Hum! He Li Mu is not easy to mess with, is Lao Tzu easy to mess with! Wu Shilu, the head of the Wu family, hit the desk with a heavy punch, and the heavy case almost fell apart.

"The patriarch is still patient for the time being, I think the Huns are not drunk." Meng Yi and Wu Shilu, the patriarch of the Wu family, had a very happy conversation, so they naturally didn't want to see him in trouble.

"Why? Did the Huns have tricks? When the head of the Wu family, Wu Shilu, heard this, he naturally came to his senses.